Furnace-arch construction.



M. H. DETRICM.

FURNACE ARCH CUNSTR'UCTION.

APPLICATION FILED FEB. 19. I916.

Patented Nov. 5, 1918..

hurrah s'ra rns PATENT UFFTUE.

MYRON H. nurnrck, or CHICAGO, IL In'oIs, n'ssrenon TO M. H. nn'rnrox oo.,' or

. cnIcae InLIno s, a oonronn'rron or ILLrnoIs.

Specification of Letters Patent.

Patented Nov. 5,.f9f8.

Application filed February 19, 1916, Serial No. 793%.

To all whom it may concern:

- Be it known that I, MYRoN H. DETRIOK, a citizen of the United States, residing at the city of Chicago, in the countyof Cook and State of'lllinois, have invented certain new and useful improvements in Furnace-Arch Constructions,.,of which the following is a specification. w

My invention relates to furnaces which are used for the heating of steam boilers and for other purposes where a high degree of heat is required. The fire bricks which are used to form the arches of such furnaces are ings, in which Figure 1- is a top'view of a portion of a furnace arch;

Fig. 2 is a cross section of the structure on line 22' of Fig. 1;

Fig. 3 is a vertical section of the structure on the line 33 of Fig. 2;

Fig. t is a perspective view of one of the inner bricks or tiles of the arch;

Figs. 5 and 6 are perspective views of an end brick and an extension holder therefor, respectively.

Further describing my invention with reference to the drawings: 11 are channel bars secured in spaced relation and with the cover plates 2-2 forming compound girders supported by the furnace slde walls.

3 designates hangers depending verticallybetwcen and below the girder bars, the upper ends of such hangers havmg cross-pieces which rest upon the tops of the bars. Each of the arch bars is pivotally connected at intervals to the lower ends of the hangers so as to be freely and uniformly suspended thereby from the girders. The arch bars 1n the form illustrated comprise vertical webs 5, to which the hangers are attached, and

upturned longitudinal flanges 6 along their lower edges. 7 designates fire bricks (or tiles) suspended from the arch bars, each of said bricks, as illustrated in Fig. 4, being provided with a groove 8 extended inwardly and upwardly across the entire face thereof. These bricks should be hung in pairs, one on each side of the arch bar, and when so hung the weight of the bricks will not only set the adjacent grooved face closely in contact but will maintain the arch bar structure in proper balance and permit variable movement, in parallelism, of the suspended parts in order to compensate for their relative longitudinal contraction and expansion. In each brick (7) of the last row at the ends of the arch bars, the groove extends only partially across the face of the brick, so that a portion of the brick projects beyond and abuts against the end of the adjacent bar, thereby serving to protect the latter.

In order more efiectually to protect the rearward ends of the arch bars from the destructive action of the heat, I provide a lever-like holder of novel construction whereby a row of nose bricks can be detach. ably supported rearwardly of the arch bars and against the last row of bricks carried by the latter. Each of these nose bricks, (of which one is shown in perspective in Fig. 5), is similar to the brick shown in Fig. 4, except that the groove 10 is not extended entirely across the face. The holder in its preferred form comprises a vertical web '11 having a basal plate 12 at right angles thereto. A part of the web extends out- 'wardly and downwardly and terminates in two laterally and upwardly extended flanges 14:, upon which. maybe hung a pair of the nose bricks as illustrated. The forward part of the web 11 extendsinwardly under the girder, and the plate 12 rests on that row of bricks supported by the outer ends of the arch bars. The holder thus constitutes, in efiect, a lever which is fulcrumed on the top of the brick or bricks,,-'?' in such a manner that the weight of the nose bricks maintains the inwardly projecting member of the lever in contact with the opposing under portion of the girder. The holder, beingseparate and independent of the arch bar, may be readily applied to or removed from the structure as occasion may require. The construction is exceedingly simple, cheap and edective and requires no nice fitting or adjustment of 'connectioun 1. In a furnace having an arch bar, a fire brick supported thereby, a nose-brick adjacent said fire brick, and a stationary member above said bar, a lever-like extension holder comprising a basal portion resting on the said fire brick, an inwardly-extending portion lying beneath and bearing against the under part of said stationary member, and a nose-brick supporting portion extending outwardly beyond the said basal portion.

2. In a furnace having a girder, an arch bar, means suspending said bar from the girder, a fire brick supported by said bar, and a nose-brick adjacent said fire brick, a lever-like extension holder comprising a basal portion resting on the said fire brick, an inwardly-extending portion bearing against the under part of the girder, and a nose-brick supporting portion extending outwardly beyond the said basal portion.

3. In a furnace having arch bars, fire bricks supported thereby, including a row of bricks at one end of the bars, and a stationary member above said bars, an extension brick holder comprising a body having between its ends a bearing portion which is seated on said row of bricks, the inner end of said body. extending beneath and bearing against the under part of the said stationary member, and the outer end thereof extending beyond the said row of bricks, said outer end having lateral flanges, and fire bricks having lateral grooves fitted upon said flanges.

4. In a furnace having transverse girders, arch bars, means suspending said bars from the girders, and fire bricks supported by the arch bars, including a row of bricks at one end of the bars, a nose-brick holder comprising a basal plate resting on said row of bricks, and a web having an inner end extension which lies beneath and bears against the under part of the outermost girder and an outer end extension beyond the said row of bricks, said outer extension having laterally and upwardly extended flanges, and

fire bricks having lateral grooves corresponding to and fitted upon the said flanges.

5. A lever-like nose-brick holder of the character described adapted to be supported adjacent the end of a brick-supporting arch bar, said holder comprising a body portion having between its ends a basal member adapted to be positioned on a bearing surface adjacent the end of the bar and thereby support the said body with one end thereof extending beneath and taking against an overhanging stop element, on a plane above said basal member, and with the other end of said body member extending outwardly beyond the said bearing surface, said latter end having a nose-brick supporting portion below the plane of support of said basal member.

6. A lever-like nose-brick holder of the character described, adapted to be supported adjacent the end of a brick-supporting arch bar, said holder comprising a body portion having between its ends a basal member adapted to be positioned on a bearing surface adjacent the end of the bar and thereby support the said body with one end thereof extending beneath and taking against an overhanging stop element, on a plane above said basal member, and with the other end of said body member extending outwardly beyond the said bearing surface, said latter end being provided with laterally and upwardly extending brick-supporting flanges below the plane of support of said basal member.

In witness whereof, I have hereunto subscribed my name this 15th day of February MYRON H. DETRICK.

Witnesses:

C. K. CHAMBERLAIN, A. S. PHILLIPS. 

